@Helen *******
The U.S. Embassy discontinued issuing income affidavits, because Thai Immigration refused to acknowledge the process which the applicant had to pass on the U.S. Embassy in Bangkok
All that a U.S. citizen needed to “prove”, was putting his/her hand on the Bible and say “I swear by God I earn 2500.- Dollar per month”
No other documentation was needed
So, since every person and his grandmother could theoretically lie about their real income, Thai Immigration discontinued to accept American income affidavits